Maverick ET73 Calibration

[robs]

How do you determine the accuracy?

I dropped the probes into ice water.

Thermocouple from PID: 32 f.
Food probe: 39 f.
Box probe: 42 f.

Would you send it back or just remember that there is an offset?

Thermocouple registered 32 deg in 2 seconds. ET73 probes took close to 5 minutes to drop to where they did.

rob

[bubbagump]

Hi Robs,

A couple of things. The speed at which the temp changes is dependant on the controller. It makes sense that the PID controller would register its temp much faster than the digital thermometer since the PID is meant to control rather than to just display temperatures. The ET-73 compared to a PID is an apple and oranges thing; there not the same and not meant to do the same things.

I personally like to test my probes with boiling water. Mainly because the temp. of boiling water is closer to what temperature I normally cook at.

A word of caution when testing the ET probes (thermistors). Avoid putting the whole probe in water. If you submerge the connection point where the wires connect to the probe it will likely damage it. I accidentally dropped mine in the sink when it was full of water and it quit working after that short bath.

I also have a little difference in temp. between the food and box probe but they were very accurate when I tested them with my PID TC in boiling water

As far as the procedure I use when testing my TC's or probes, I posted this some time ago in another thread:

"The best way to check their accuracy is to get a small pot of water boiling and place the tip of each probe in the water making sure the probes are not touching the bottom or the sides of the pot. DO NOT fully immerse the probes in the water. Watch how fast the temp rises on both units and at what temp both of them top out at. Since the boiling point of water is dependent on altitude and pressure you can use this link to check what the boiling point should be for your area."

http://www.biggreenegg.com/boilingPoint.htm


Bubbagump

[robs]

Thanks for the post. I will try this.

[Oldman]

That is a neat link.